Example: 3D cone

An annotated three dimensional drawing with transparency effects. The code has been
generated using Sketch. Sketch is a small, simple system for producing line drawings
of two- or three-dimensional solid objects and scenes. Sketch accepts a tiny scene
description language and generates PGF/TikZ or PSTricks code.
Sketch also supports hidden surface removal and its easy to embed TikZ and LaTeX code
in your drawings.

The Sketch code used to generate the drawing is available for download.
A detailed description of the code can be found in the Sketch manual.